So, on my 08, Wife was pulling it into the driveway last night, the FRONT passenger side parking light was on while she was pressing the brake. release the brake, light goes out.
i have her double check,
all the lights work when the light switch, everything seems to be ok. but this cross feed or something..

again. press brake, front right passenger parking light will illuminate.

Might be bad ground on brake light. I have seen this on older vehicles 

i was thinking more the lines of a bad break light switch to let the juice back feed to the front. maybe even the light switch, i'll remove the rear taillight and see what i come up with.

New to site need help 08 cummins pulsating lights all of them it starts when I use my rear window or high to low beam or power windows or anytime I apply a load to the electronics but if I turn the blower motor to high it will quit in about 10 seconds please help I am pulling my hair out over this one

I have seen this before on an old 88 Chevy.  We had some corrosion making contacts in the trailer lights plug on the bumper.